The U.S. Army has not and will not approve enlistment waivers for individuals with a history of self-mutilation or other documented serious mental health conditions, the Army’s top general said Wednesday.

The United States Army is quickly reorganizing to expand its training, advising, and assistance to foreign forces — even as two militaries trained and equipped by the U.S. are clashing with each other in the contested Iraqi city of Kirkuk. The flaring military confrontation between Kurds and Iraqi federal troops highlights the dangers of bolstering the battlefield capabilities of foreign governments whose objectives don’t necessarily align with America’s national interests.

The Army has reshaped its primary operating concept to focus on large-scale combat against enemies with technology and capabilities similar to American forces after 16 years of fighting insurgent groups in the Middle East and southwest Asia.

North Korea is the single most dangerous threat facing the international community according to the U.S. Army’s top uniformed official and matters are coming to a head. Pyongyang is advancing far more quickly with its nuclear and ballistic missile programs than was expected by the United States. Indeed, the United States is at point where it must make some tough policy choices on how to deal with the North Korean threat.

The Army would like more soldiers, but only if Congress provides ample funding to train them properly, the service’s top general said Wednesday, warning that insufficiently prepared troops would lead to a “hollow Army.”